package com.zy;
import com.alibaba.druid.pool.DruidDataSourceFactory;

import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;
public class DataSourceUtils {
    public static DataSource dataSource;
    //静态代码块，类加载时读取配置文件，并且创建数据源对象
    static {
        //创建properties对象
        Properties properties = new Properties();
        //加载配置文件
        try {
            properties.load(DataSourceUtils.class.getClassLoader().getResourceAsStream("druid.properties"));
            //创建数据源
            dataSource = DruidDataSourceFactory.createDataSource(properties);
        }catch (Exception e){
            throw new RuntimeException(e);
        }
    }
    /**获取连接**/
    public static Connection getConnection(){
        if (dataSource != null){
            try{
                return dataSource.getConnection();
            }catch (SQLException e){
                throw new RuntimeException(e);
            }
        }
        return null;
    }
}
